Electromagnet.



C. E. SGRIBNER. BLEOTROMAGNET.

APPLIUATION FILED MAR. 12, 1910.

1,012,020. Patented Dec. 19, 1911.

//1 venfor C. Scribner UNITED STATES PATENT OFFICE.

UHABLES E. SCRIBNER, OF J'ERICHO, VERMONT, ASSIGNOR T0 WESTERN ELECTRIC COMPANY, OF NEW YORK, N. Y., A CORPORATION OF ILLINOIS.

ELECTROMAGNET.

Specification of Letters latent.

Application filed March 12, 1910.

Patented Dec. 19, 1911.

Serial No. 548,871.

To all whom it may concern:

Be it known that I, Ornumss E. SCBIBNER, a citizen of the United States, residing at Jericho,'in the county of Chittenden and State of Vermont, have invented a certain new and useful Improvement in Electromagnets, of which the following is a full, clear, concise, and exact description.

My invention relates to electromagnets and its object is to provide improved means for adjustably supporting the armature of an electromagnet.

In the electromagnet of my invention the armature supporting member is in threaded engagement with a rotatable member associated with the core of the electromagnet whereby the supporting member, and the armature carried thereby, may be adjusted by turning the rotatable member. The rotatable member may be carried within the core of the electromagnet and preferably forms a part of the magnetic circuit.

My invention is particularly useful in its application to bells and is herein illustrated by its embodiment in a telephone bell of the general type known as harmonic, wherein the armature is carried by a reed.

My invention will be more readily understood by reference to the accompanying drawing, in which Figure 1 is a side elevation, partly in section, of a telephone bell embodying my in vention, and Fig. 2 is a fragmentary vertical sectional view on the line 22 of Fig. 1, said view being enlarged to bring out more clearly certain details ofconstruction;

Referring to the drawing, 3 and 4 are the coils of the electromagnet, 5 and 6 are the gongs, 7 is the bell tapper arm, and 8 is the armature of a telephone bell of the general type already referred to. The armature 8 is carried by a reed 9, which reed is rigidl; mounted on a support 10. The parts mentioned being well understood by those skilled in the art, are not herein described in detail.

Intermediate the support 10 and the else 7 tromagnet is a rotatable member 11, said member having a portion 12 adapted to make threaded engagement with. the support 10. The member 11 may be carried by the fixed cores 19 of the electromagnet, preferably within said cores, or within hollow extensions 13 thereof as shown in the drawing. In the drawing the member 11, which adapted to enter the groove 1 whereby said a member 11 may be rotated without longitudinal movement. The member 11 is provided with a portion 16 of hexagonal or other suitable form, whereby it may be readily turned by n'eans of a wrench or otherwise. v

17 is a nut for locking the member 11 in any desired position with respect to the part on which it is rotatably carried, and 18 is a nut for locking said member in rigid connection with the support 10.

In the foregoing the details of construction have been described in connection with one extremity of the armaturesupport 10. It will be readily understood that while one end of the support might be fixedly mounted and the other end adjustably car" ried, both ends are preferably adjustably associated with the electromagnet as shown in the drawings and in accordance with the foregoing description.

With the construction described, it will be understqod that the rotation of the member 11 moves the corresponding end of the support 10 and with it the corresponding end of the armature 8, toward or from the electromagnet 'according'to the direction in which said member is turned. It is obvious that by loosening the nuts 17 and 18 and turning either or both of the members 11, the armature may be moved bodily to- 'ward the electromagnet, or may be tilted, or

me. be made to undergo a combination of size movements as desired. Nuts 17 and 18 would, of course,- be tightened upon securing the desired relation between the armature and the poles of the electromagnet, thereby bringing the parts into rigid connection.

Having described my claim l:

1. he combination with an electromag-- net, of a rotatable member associated with the core of said electromagnet and fixed against longitudinal movement, an armature, and a support for said armature in threaded engagement with said rotatable member.

2. The combination with an electromaginvention, I

net having a core'comprising a fixed member and a rotatable longitudinally fixed member, of an armature, and a support for said armature in threaded engagement with said rotatable member.

3. The combination with an electromagnet having a core comprising a fixed member and a rotatable longitudinally fixed member carried one within the other, of an armature, and-a support for said armature in threaded engagement with said rotatable member.

4. The combination with an electromagnet having a core comprising a fixed member and a rotatable longitudinally fixed member carried within said fixed member, of an armature, and a support for said armature in threaded engagement with said rotatable member. I

5. The combination with an electromagnet, of core members comprising fixed mem bers and rotatably movable but longitudinally fixed members, an armature, and a support for said armature in threaded engagement with said rotatable members.

6. The combination with an electromagnet having hollow core extensions, of an armature, a su port for said armature, members rotatab carried within said core extensions and h xed against longitudinal movement, said members being in threaded engagement with said su port, whereby said support may be ad'usteg with respect to said electromagnet, an locking devices for holding said support and said members in their adjusted positions.

7. The combination with an electromagnot having hollow core extensions, of an armature, a sup ort for said armature,

members in threa ed enga ement with said support, said members eac having an apnu ar groove, projections carried by said core extensions, said rojections enga ing with the grooved portions of said mem ers, and looking devices for holdin said members and support in their a usted positions.

In witness whereof I hereunto subscribe my name this 11th day of March A. D.,

CHARLES E. SCRIBNER. Witnesses:

Invme MACDONALD, MORGAN WAsHetmN, Jr. 

